Elemination of lead pollution with chelate by using some agricultural plants from the soils by fitting phytoremediation method

Phytoremediation is a method which plants are used to eliminate soil, underground, surface waters and even airborne pollutants. In this study, Brassica napus L. Chenopodium quinoa Willd. and Allium cepa L. species are used by the phytomediation method for the removal of the Pb element from the soil that is synthically contaminated and the sludge that is natural contaminated, were investigated. In addition, complex constructor chelate and microbial fertilizer were added to increase phytoremediation capacity and changes in element removal performance of plants were observed. EDTA, nitro, pyridine, 1-10 phenanthroline, and humic acid were used as chelate support in heavy metal removal. When the Tolerance Index (TI) values were examined, it was determined that the addition of chelate caused a change in the growth and dry weight amounts of the plants. In the study, the amount of heavy metal deposition in the root, stem and leaves of the plants were investigated and it was found that accumulation of the species in the roots was more. The amount of heavy metal accumulation was found higher in experimental pots especially used humic acid, EDTA and nitro chelate. When the Transport Factor (TF) values were examined, EDTA, humic acid, pyridine and 1-10 phenantroline chelate were found like A. cepa> C. quinoa> B. napus and also nitro chelate was found like C. quinoa> A. cepa> B. napus. The most effective accumulation was in A.cepa and C. quinoa species. When B. napus nitro, pyridine and 1-10 phenanthroline chelate, which are known as hyperaccumulators, were added, observed that this feature was not shown. It was determined that species Pb element accumulation in the roots and carrying to the upper organs , increased with the chelate addition. Accordingly, it shows that humic acid, EDTA and nitro can be used to increase heavy metal uptake.